【发布时间】:2019-05-16 06:49:29
【问题描述】:
我一直在尝试反序列化包含表示颜色的整数列表的 Json 字符串,然后使用 Entity Framework 将其插入到 sql 数据库中。我对 Entity Framework 很陌生,并且读到它不支持原始类型的集合,我想绕过它我可以添加类
public class Colors
{
public int Id { get; set; }
public int Color { get; set; }
}
然后在 CharacterColor 类中创建一个列表来保存整数
public List<Colors> Colors { get; set; }
但是在尝试反序列化 Json 时出现错误。
Newtonsoft.Json.JsonSerializationException: '错误转换值 255 键入“ORAC.Data.Entities.Colors”。小路 'characterColors[0].colors[0]',第 1 行,位置 1200。 ArgumentException:无法从 System.Int64 转换或转换为 ORAC.Data.Entities.Colors。
任何对实体框架有更多经验的人都能够看到我哪里出错了。
Character character = JsonConvert.DeserializeObject<Character>(jsonString);
Json 字符串
"{\"packedRecipeType\":\"DynamicCharacterAvatar\",\"name\":\"Character\",\"race\":\"HumanMaleHighPoly\",\"dna\":[{\"dnaType\":\"UMADnaHumanoid\",\"dnaTypeHash\":-212795365,\"packedDna\":\"{\\\"height\\\":128,\\\"headSize\\\":128,\\\"headWidth\\\":93,\\\"neckThickness\\\":108,\\\"armLength\\\":135,\\\"forearmLength\\\":128,\\\"armWidth\\\":116,\\\"forearmWidth\\\":128,\\\"handsSize\\\":118,\\\"feetSize\\\":109,\\\"legSeparation\\\":128,\\\"upperMuscle\\\":129,\\\"lowerMuscle\\\":152,\\\"upperWeight\\\":128,\\\"lowerWeight\\\":81,\\\"legsSize\\\":134,\\\"belly\\\":66,\\\"waist\\\":108,\\\"gluteusSize\\\":38,\\\"earsSize\\\":121,\\\"earsPosition\\\":233,\\\"earsRotation\\\":61,\\\"noseSize\\\":115,\\\"noseCurve\\\":128,\\\"noseWidth\\\":124,\\\"noseInclination\\\":128,\\\"nosePosition\\\":128,\\\"nosePronounced\\\":128,\\\"noseFlatten\\\":118,\\\"chinSize\\\":128,\\\"chinPronounced\\\":128,\\\"chinPosition\\\":128,\\\"mandibleSize\\\":128,\\\"jawsSize\\\":128,\\\"jawsPosition\\\":128,\\\"cheekSize\\\":128,\\\"cheekPosition\\\":128,\\\"lowCheekPronounced\\\":128,\\\"lowCheekPosition\\\":195,\\\"foreheadSize\\\":128,\\\"foreheadPosition\\\":128,\\\"lipsSize\\\":128,\\\"mouthSize\\\":128,\\\"eyeRotation\\\":128,\\\"eyeSize\\\":69,\\\"breastSize\\\":128}\"},{\"dnaType\":\"UMADnaTutorial\",\"dnaTypeHash\":-1679007774,\"packedDna\":\"{\\\"eyeSpacing\\\":128}\"}],\"characterColors\":[{\"name\":\"Skin\",\"colors\":[255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0]},{\"name\":\"Hair\",\"colors\":[255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0]},{\"name\":\"Eyes\",\"colors\":[255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0]},{\"name\":\"Undies\",\"colors\":[255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0,255,255,255,255,0,0,0,0]}],\"wardrobeSet\":[{\"slot\":\"Underwear\",\"recipe\":\"MaleUnderwear\"}],\"raceAnimatorController\":\"Locomotion\"}"
实体
public class Character
{
public int UserId { get; set; }
public int CharacterId { get; set; }
public string CharacterName { get; set; }
public string PackedRecipeType { get; set; }
public string Name { get; set; }
public string Race { get; set; }
public List<Dna> Dna { get; set; }
public List<CharacterColor> CharacterColors { get; set; }
public List<WardrobeSet> WardrobeSet { get; set; }
public string RaceAnimatorController { get; set; }
public User User { get; set; }
}
public class Dna
{
public int Id { get; set; }
public string DnaType { get; set; }
public int DnaTypeHash { get; set; }
public string PackedDna { get; set; }
}
public class CharacterColor
{
public int Id { get; set; }
public string Name { get; set; }
public List<Colors> Colors { get; set; }
}
public class WardrobeSet
{
public int Id { get; set; }
public string Slot { get; set; }
public string Recipe { get; set; }
}
public class Colors
{
public int Id { get; set; }
public int Color { get; set; }
}
解决方案 我更新了 Json 并用新的对象数组替换了颜色数组
JObject jsonToParse = JObject.Parse(jsonString);
JArray characterColors = (JArray)jsonToParse["characterColors"];
foreach(var item in characterColors)
{
JArray colors = (JArray)item["colors"];
JArray newColorsArray = new JArray();
var i = 0;
foreach (var col in colors)
{
var color = new Color
{
ColorId = i,
Value = (int)col
};
newColorsArray.Add(JToken.FromObject(color));
i++;
}
colors.Replace(newColorsArray);
}
【问题讨论】:
-
在 JSON 中,
colors数组是 24 个整数的列表,而在您的类中,Colors是Colors对象的列表,其中每个Colors对象有两个 int属性,Id和Color。您收到错误是因为 Json.Net 不知道如何在整数数组和对象列表之间进行转换。这可以通过JsonConverter解决,但您需要解释如何将整数数组映射到对象中。
标签: c# json entity-framework